[Idea] Route: Powerful filters

Nette 2.1 added the very powerful global filters which allow you to filter one parameter based on a value of another parameter. For example in route `<lang>/<presenter>/<action>` you can filter `<presenter>` and `<action>` based on `<lang>`. I propose to add this power also to normal filters by simple passing the whole `$params` array. Please note that this is still way less powerful than global filters (I should write an article about how powerful they really are). I also decides to pass whole http/app request.

What do you thing?